Question

Solve the simultaneous equations. 3x – 4y = 15; x + y = -2​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

3x-4y=15---------1. x+y= -2-----------2

multiply equation 2 by 4

we get

4x+4y=-8----------3

add equation 1 and 3

3x-4y+4x+4y=15+(-8)

3x+4x=7

7x=7

x=1

put value of x in equation 2

x+y=-2

2+y=-2

y=-4

x=1 and y=-4